It's a Small World for a Minnesota Model Maker

This odd-looking contraption is a 1/2-scale model of a 1918 Maytag “fruit jar” 5/8 hp engine.

A pair of hot-air engines made by Neal James. They work off the heat from the hand. He scaled down larger hot-air engines, and sells the plans for these two. The greater the temperature disparity between the hand and the air, the faster the engines turn.

Neal James demonstrates operation of his Huff ‘n Puff hot-air engine.

This 1/8-scale 4-cylinder Wall C601 model engine is the first model Neal James ever worked on. Neal plans to finish it by this spring.